Installing an exhaust can be a fairly simple operation...or one that
may need some torching or other barbaric means to remove. A
rusty bolt will usually turn into a broken bolt very quickly.
This article focuses on the installation of a Greddy MX exhaust on a
'98 Nissan 240SX. Most of the details covered in this article
will apply to any vehicle.

Tools Necessary:

reliable socket set

metric wrenches

jack and jack stands or ramps

penetrating oil

hammer

propane gas torch (maybe)

Start by raising and supporting the entire
vehicle.

Swapping the exhaust is a very easy task when
it comes down to the details. However, a rusty bolt can turn a
quick project into an ordeal. You may need to soak the bolts
with penetrating oil to help with the operation. If the bolts
will not budge, you may need to use a torch or have a shop remove
them for you.

Remove the nuts and bolts that attach the
exhaust to the cat. In some cases you may need to remove the
cat along with the exhaust to remove all of the bolts (not the case
with the 240)

Spray some lubricant on the rubber hangers and
then use a screwdriver or pry bar to remove all of
the rubber hangers. You may need to support the system while
you remove all of the hangers.

Drop the exhaust and take a moment to compare
how much nicer the new system looks compared to the original
exhaust. Transfer the rubber hangers to the new exhaust.
Depending on the vehicle, you may be able to assemble the exhaust on
the ground (as with the 240) or you may need to assemble it a piece
at a time. Either way, do not tighten the bolts until
everything is in place. This will allow for proper fitment of
the exhaust.

With the exhaust in place, tighten all of the
bolts and make sure all of the hangers are attached.